Stadium: Court 2 Round: 26 Ground: Hardcourt outdoor
| ITF - W15 Monastir | 2021/01/05 10:35 | Marthiens, Karen v Safarova, Zdena | 1-6,6-4,7-6 |
| ITF W15 Madrid | 2020/12/07 10:00 | Marthiens, Karen v Lucia Martinez | 6-1,5-7,8-10 |
| ITF W15 Madrid | 2020/12/06 17:00 | Augustinova, Natalie v Marthiens, Karen | 3-6,2-6 |
| ITF W15 Platja D'Aro | 2020/10/25 11:00 | Marthiens, Karen v Cazeaux, Amandine | 4-6,6-3,10-12 |
| ITF W15 Saint Palais Sur Mer | 2020/09/07 16:05 | Vicky Van De Peer v Marthiens, Karen | 6-2,6-4 |
| ITF W15 Saint Palais Sur Mer | 2020/09/06 13:15 | Marthiens, Karen v Maelie Monfils | 6-2,6-3 |
| ITF W25 Marbella | 2020/09/01 08:00 | Sebastianna Scilipoti v Marthiens, Karen | 7-5,6-1 |
| ITF W25 Marbella | 2020/08/31 08:30 | Marthiens, Karen v Alba Rey Garcia | 6-4,7-5 |
| ITF - W15 Monastir | 2021/01/05 09:30 | Katarina Kozarov v Zineb El Ouazzani | 6-0,6-2 |
| ITF - W15 Monastir | 2020/12/31 09:30 | Katarina Kozarov v Vaidehi Chaudhari | 6-7,2-6 |
| ITF - W15 Monastir | 2020/12/30 09:50 | Vinahradava, Hanna v Katarina Kozarov | 2-6,0-6 |
| ITF - W15 Monastir | 2020/12/23 08:30 | Martyna Kubka v Katarina Kozarov | 6-2,6-1 |
| ITF - W15 Antalya | 2020/12/16 12:05 | Gergana Topalova v Katarina Kozarov | 3-6,6-3,6-4 |
| ITF - W15 Antalya | 2020/12/16 08:45 | Milenkovic, Kristina v Katarina Kozarov | 2-6,4-6 |
| ITF - W15 Antalya | 2020/12/15 11:00 | Magdalena Stoilkovska v Katarina Kozarov | 1-6,4-6 |
| ITF - W15 Antalya | 2020/12/15 07:00 | Aksu, Semra v Katarina Kozarov | 3-6,4-6 |